Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	3 Months Ended
	Jul. 03, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 6,727	$ 7,337
Reconciliation to cash flows:
Depreciation and amortization	2,043	1,724
Stock compensation expense	209	283
Loss (gain) from property disposals	2	(13)
Changes in operating accounts (using) providing cash:
Trade receivables	(1,060)	(2,322)
Inventories	(3,314)	(4,517)
Accounts payable	2,541	2,044
Accrued liabilities	(3,485)	(4,797)
Income taxes	3,177	4,521
Other	357	363
Net cash provided by operating activities	7,197	4,623
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant, and equipment	(3,626)	(3,301)
Purchases of investments	(200)	(1,960)
Sale and maturities of investments	5,635	4,275
Acquisition of Vertex	(1,709)
Proceeds from property disposals	89	40
Net cash provided by (used in) investing activities	189	(946)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(3,095)	(2,879)
Other	53
Net cash used in financing activities	(3,042)	(2,879)
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,344	798
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	18,940	18,772
CASH AND CASH EQUIVALENTS, END OF PERIOD	23,284	19,570
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for income taxes	829	34
Noncash investing activities-
Capital expenditures in accounts payable	$ 381	$ 242